‘decision requirements graphs’ (DRG): representation of a decision complex as a directed lattice of data and decision flows from data source inputs, possibly through BKMs, to Decision Tables whose results become data to other BKMs and decision tables.

A ‘decision tree’ can be represented as a DRG with component decision tables for the tree branches, although DMN implementers do not regard this as ideal.

Finally, we come to the overall problem: The requirement for ‘business people’ to be sufficiently careful in their terminology that the formalized models can be a basis for automation of processes and decisions. That is the nominal domain of SBVR.